bangert



(No Model.) 2 Sheets-Sheet 1.

J. D. BANGERT.

MACHINE FOR MIXING AND AERATING FLOUR. No. 274,697. PatentedMar.27,1883.

- [TIES I- L; f a 1 i "a" I PWF'INE EEE- INVEN'TDF=L K ill/21%... Z 1 MM I 2Sheets-Sheet 2.

(No Model.)

J. D. BANGERT.

MACHINE FOR MIXING AND AERATING FLOUR. No. 274,697.

Patented Mar.27, 1883.

FIE5 111- INVEN r L3 "UNITED STATES PATENT OFFICE.

JOHN D. BANGERT, OF BALTIMORE, MARYLAND.

MACHINE FOR MIXI NG AND AERATING FLOUR.

SPECIFICATION forming part of Letters Patent No. 274,697, dated March27, I883.

' Application filed September 11,1882. (No model.)

To all whom it may concern:

Be itknown thatl, J OHND. BANGERT, of the city of Baltimore, and Stateof Maryland,have invented certain Improvements. in Machines for Mixingand Aerating Flour, of which the following is a specification.

This invention relates to a machine for mixing flour or different gradesand values and reducing the same to a uniform brand; also, for aeratingthe flour during the sifting and mixing processes to arrest and preventfermentation and heating.

In the description of my invention which follows reference is made tothe accompanying drawings, forming a part hereof, and in which- V FigureI is a longitudinal section of the improved machine' Fig. II is asectional plan of the same, taken on the dotted line 1; w, Fig. I. Fig.III is a transverse section taken on the dotted line :0 y, Figs. I andII. Figs. IV, V, VI, and VII are views of parts of the invention on anenlarged scale, as hereinafter fully described.

Similar letters of reference indicate similar parts in all the views.

A is the frame of the machine, a part of which is provided with a topand sides, respectively represented by a and b, and doors 0, havinghinges c, to form a chamber, 13.

(3 O are trays connected together at the ends by boards d, situatedwithin the chamber B and adapted to have a reciprocating longitudinalmovement, derived from the crank-shaft D through the medium of aconnecting-rod, 0, one end of which is pivoted to the forward end of thetrays. The trays G are supported within the chamber Bhy means of tracksf, fastened to the sides of thechamber, and sheaves y, secured to theunder side of the trays. (See Figs. I and II.) The trays are eachprovided with sieves'h,and between the upper sieves is a mixer, Themixer t rests on the under sieve of the upper tray, and is connected tothe wall of the chamber 13 by means of chains k and cross-pieces I.These chains pass loosely through the ends of the tray. Consequently thesaid mixer is held stationary during the reciprocating movementof thetrayand sieves. The lower sieves are each provided with a mixer, m,which, rests thereon. The mixers 41 and m herein shown consist of aseries of transverse corrugated rods or wires united at their ends bylongitudinal strips, (see Fig. III but I do not con'line myself to thisexact construction.

E E are breakers, consisting'of pendent pivoted bars connected by rods,(see Fig. III,) and they have preferably an irregular vibratorymovementin the longitudinal motion of the trays. They may, however, beconnected at their lower endsby a chain or rod to give them The machinebeing placed in operation, the I flour to be mixed and aerated is placedin a hopper, G, located over the breakers E. In Fig. I the hopper isshown asaplaiu box; but I prefer to use a hopper divided into sections,so as to isolate the diiferent kinds of flour placed therein, andprovided with a sliding gate un- I derneath, to prevent the admission ofthe stored flour to the breakers until such time as the various sectionsof the hopper are filled. (See Figs. VI and VII.) In Figs. IV and V thepartitions in the hopper are shown as removable, in order to allow ofthe revolution of a paddle. This primary mixing, which is done previousto opening the gate leading to the breakers of the machine, is necessaryin some cases where the different kinds of flour to be united have notbeen packed to the same density.

After the gate is opened the flour falls to thetop sieve in the uppertray, and is carried backward and forward on the same and brought incontact with the breakers E, which serve to reduce the lumps. As theflour passes from the top to the bottom sieve in the upper tray it is voperated upon by the mixer i, which is: stationary, and after passingthrough the saidbotsieves, combined with fixed or stationary mixtomsieve is caught by the fans F F, which aerate it and reduce thetemperature of the flour if the same has become heated. The flour nextpasses the lower set of mixers and sieves, and finally falls to thefloor or to barrels, as may be arranged. If the flour is collected onthe floor, a removable screen or frame covered with canvas is placedexteriorly of the machine to prevent the flour being scattered and lost.As the trays do not come in close contact with the inner sides of thechamber A, I place above the edges of the lower tray defleeting-strips10, which prevent the escape of the flour after it is thrown up by thefans F. To prevent the compression and expansion of air in the chamber Bforward and in the rear of the trays, caused by the lattersreciprocating movement, I form apertures r in the boards 41, and coverthem with-wire cloth of such mesh as will admit of the passage of airthrough it and yet intercept the flour.

In the drawings I have shown the tracksf as formed of smooth pieces ofiron; but if a shaking motion of the trays, in addition to thereciprocating one, is desired, the upper surface of the rails formingthe track can be corrugated.

While I prefer longitudinally-reciprocating ers, this arrangement may bereversed without deviating from the spirit of the invention,

which aims to enforce the sifting and mixing of the flour.

I claim as my inventionp 1. A machine for mixing and aerating flour,having the following essential elements in combination, viz: apractically-closed chamber, means for introducing flour thereto, aseries of longitudinally-reciprocating trays having sieves therein, asystem of mixers which rest on the said sieves and are provided withchains or links to prevent their having movement in common with the saidsieves, and means for effecting the said longitudinal reciprocatingmovement of the said sieves, substantially as specified.

2. In a machine for mixing and aerating flour, a longitudinally movingand reciprocating sieve, having a stationary or fixed mixing devicerestiu g thereon, and a series of revoluble fans located underneath thesaid sieve and mixer, the whole being combined within a prac-

